Temperature control system for growing high-purity monocrystals
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United States of America Patent
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May 5, 1998
Grant Date -
N/A
app pub date -
Jan 16, 1996
filing date -
Jan 16, 1996
priority date (Note) -
Expired
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Abstract
A crystal-pulling apparatus incorporates a temperature sensor and an adjustable radiation shield. The temperature sensor measures temperatures of a melt surface adjacent to a solidification interface between a crystal and the melt. The radiation shield regulates radiational cooling of the melt. A control system adjusts the radiation shield in response to changes in the measured temperature of the melt for enhancing dislocation-free growth of the crystal.
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